High head turbine: In this type of turbines, the net head varies from 150m to 2000m oreven more, and these turbines require a small quantity of water. Example: Pelton wheelturbine.Medium head turbine: The net head varies from 30m to 150m, and these turbin...[繼續閱讀]

    Turbine shaft can be either vertical or horizontal. In modern practice, Pelton turbinesusually have horizontal shafts whereas the rest, especially the large units, have vertical shafts....[繼續閱讀]

    The specific speed of a turbine is defined as the rotating speed of a geometrically similarturbine that will develop unit power when it works under a unit head (1m head). It isprescribed by the relation Low specific speed turbine: The specific speed is le...[繼續閱讀]

    Based on the pressure change of liquid when it flows through the runner, turbines can begrouped into two types. One type is the impulse turbine, which utilizes the kinetic energy of ahigh-velocity jet of water to transform the water energy into mechanical...[繼續閱讀]

    The differences between Impulse and Reaction Turbines are listed in Table 1.1.Table 1.1 Differences between Impulse and Reaction TurbinesContinue...[繼續閱讀]

    1. Explain the classification of turbines.2. Classify the turbines based on head, specific speed and hydraulic actions. Giveexamples for each.3. List the differences between impulse turbines and reaction turbines....[繼續閱讀]

    [1] S. Sarkar, Gautam Biswas, S.K. Som and IIT Kanpur. Lecture 4 Turbines, Classification,Radial flow turbines, Axial flow turbines [DB/OL]. (2009-12-31) [2006-06-16].http://nptel.ac.in/courses/105107059/module6/lecture4/lecture4.pdf....[繼續閱讀]

    accelerate 加速 adjustable-blade 調節葉片 airtight 密封的 atmospheric pressure 大氣壓 axial direction 軸向 axial flow turbine 軸流式水輪機 axial line 軸線 axis 軸 band 下環 Benoit Fourneyron 貝努瓦·富聶隆 blade axis 葉片軸 blade 葉片 bucket 斗葉；葉...[繼續閱讀]

    Water is brought to the hydroelectric plant site through large penstocks, at the end ofwhich there is an injector, which converts the pressure energy completely into kinetic energy,as shown in Fig.2.1. This will convert the liquid flow into a high-speed j...[繼續閱讀]

    This has to be provided for movement of the spear. If the servomotor is outside thenozzle, a bend has to precede the straight portion of the nozzle to allow the spear stem to bebrought out. In this type, the symmetry of the flow is only in one plane and t...[繼續閱讀]